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WO2012051750A1 - Procédé, appareil formant terminal et station de base pour transmettre un signal de réponse sur la liaison montante - Google Patents

Procédé, appareil formant terminal et station de base pour transmettre un signal de réponse sur la liaison montante Download PDF

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Publication number
WO2012051750A1
WO2012051750A1 PCT/CN2010/077870 CN2010077870W WO2012051750A1 WO 2012051750 A1 WO2012051750 A1 WO 2012051750A1 CN 2010077870 W CN2010077870 W CN 2010077870W WO 2012051750 A1 WO2012051750 A1 WO 2012051750A1
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WO
WIPO (PCT)
Prior art keywords
indication information
component carrier
correctly received
uplink
downlink data
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2010/077870
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English (en)
Chinese (zh)
Inventor
兰元荣
张元涛
周华
吴建明
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Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to PCT/CN2010/077870 priority Critical patent/WO2012051750A1/fr
Priority to CN2010800696569A priority patent/CN103155634A/zh
Publication of WO2012051750A1 publication Critical patent/WO2012051750A1/fr
Priority to US13/865,465 priority patent/US9351287B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a method, a terminal device, and a base station for transmitting an uplink response signal. Background technique
  • a user equipment receives downlink data sent by a base station, and the user equipment UE decodes the downlink data, and obtains a response signal of the downlink data according to the decoded result. And transmitting the uplink control information including the response signal on the Physical Uplink Control Channel (PUCCH), so that the base station determines whether the data transmission is correct or incorrect according to the uplink control information, and determines whether the data needs to be retransmitted.
  • PUCCH Physical Uplink Control Channel
  • the uplink control information includes a response signal for downlink data, such as acknowledgement (ACK: Acknowledgment) / negative acknowledgement (NACK: Negative Acknowledgment) / discontinuous transmission (DTX: Discontinuous Transmission), and channel state information (CSI), etc.
  • ACK indicates that the data is correctly received
  • NACK indicates that the data is incorrectly received
  • DTX indicates that the UE has not received any downlink control data, that is, no control signaling for scheduling downlink data transmission is received.
  • the response signals transmitted in the PUCCH correspond to one physical channel resource, one time domain sequence and one frequency domain sequence, respectively.
  • FIG. 1 is a schematic diagram of resource allocation in a carrier aggregation (CA) system.
  • CA carrier aggregation
  • PCC Primary Components Carrier
  • PUCCH Physical downlink control channel
  • CCE Control Channel Element
  • SCC secondary component carrier
  • the PUCCH resource is explicitly indicated by the ACK-NACK Resource Indicator (ARI: ACK_NACK Resource Indicator) in the PDCCH.
  • ARI ACK_NACK Resource Indicator
  • the base station first sends a user equipment (UE: User Equipment) through a radio resource control protocol (RRC: Radio Resource Control).
  • RRC Radio Resource Control
  • a list of PUCCHs that can be used, the list including the correspondence between the status indicated by the ARI and the PUCCH resource, for example, may include several PUCCH resources, such as ⁇ PUCCH0, PUCCH 1, PUCCH2, PUCCH3 ⁇ , where ARI 01 corresponds to the resource.
  • the PDCCH in the SCC includes 2 s ARIs, only four states can be indicated, and it is impossible to select one of the plurality of N PUCCHs prepared for explicit allocation;
  • the uplink subframe (UL subframe) and the downlink subframe (DL subframe) are in many cases one-to-many, that is, for any user equipment UE in the system, an uplink subframe is required. Transmitting a response signal value of a plurality of downlink subframes corresponding thereto.
  • Figure 2 is a schematic diagram of the configuration options available in the LTE TDD system. As shown in FIG. 2, in one frame, the number of downlink subframes and uplink subframes is inconsistent. Taking configuration 2 as an example, there are 8 downlink subframes (since S cannot be used to transmit uplink control information, so S is regarded as downlink) and 2 uplink subframes, and each uplink subframe is responsible for 4 downlink subframes. Feedback of the response signal (ACK/NACK).
  • ACK/NACK Feedback of the response signal
  • PDSCH Physical Downlink Shared Channel
  • FIG. 3A is a schematic diagram of a full bundling method for a CA TDD system
  • FIG. 3B is a schematic diagram of a time domain bundling method for a CA TDD system.
  • the Downlink Assignment Indicator (DAI) is present in the PDCCH and has two potential counting functions.
  • the number of PDCCHs that have been transmitted at the base station BS end accumulated to the current time. For example, when the base station BS sends the first PDCCH, it performs a label 0 and sends a second PDCCH. When you put a label on it, it is 1, and so on. If the user equipment UE successfully detects PDCCH0 and PDCCH2, according to the above label number, it is known that one PDCCH1 is lost. Although the detected downlink data are all ACKs, but the user equipment UE knows that one of the missed detections, the NACK is fed back.
  • the DAI label is first CC, and the subsequent subframe is counted cumulatively; as shown in FIG. 3B, in time domain bundling, the DAI is in one CC. It is valid in each sub-frame and is counted cumulatively.
  • the PUCCH resource allocation manner on the PCC and the SCC is: In the PCC: implicit resource mapping, such that corresponding in each subframe in the PCC
  • the PUCCH is different; in the SCC: explicit resource mapping, so that the corresponding PUCCHs in each subframe in the SCC may be different or the same, depending on whether the ARIs are the same.
  • the same resources can be allocated, such as PUCCH2 as shown in Figure 3B. Therefore, using time domain bundling can save uplink PUCCH resources.
  • the user equipment UE detects downlink data received from the PCC and the SCC and obtains a detection result (ACK/NACK), and the user equipment UE performs "AND” on all the detection results. "Operation, then the result of the "AND” operation (ACK/NACK) is transmitted on the PUCCH corresponding to the last received PDCCH.
  • ACK/NACK detection result
  • the user equipment UE performs an AND operation on the detection result (ACK/NACK) of each subframe in the same CC, and then feeds back the result after bundling to the base station through channel selection. .
  • Non-last downlink data missed detection Currently, DAI can be used to find missed detection.
  • the last downlink data miss detection problem Currently, the ACK/NACK is fed back in the PUCCH corresponding to the last PDCCH received to check whether the last downlink data is missed.
  • the user equipment UE receives the PDCCH with the DAI labels 0 and 2, but does not receive the PDCCH with the DAI label 1.
  • the user equipment UE knows that the miss detection occurs, and the feedback on the PUCCH3 corresponding to the last received PDCCH.
  • NACK after receiving the NACK, the base station BS retransmits all the data.
  • the base station BS does not know whether the user equipment UE is all received and all correct, or the last one missed and the first four pairs.
  • Figure 6 is a schematic diagram of the last PDCCH miss check encountered in time domain bundling.
  • the bundling result obtained by the user equipment UE is (ACK, ACK:>, if a QPSK symbol representation (ACK, ACK) state is adopted, and the PUCCH feedback corresponding to the last PDCCH detected in the SCC is used. Then, the base station BS can learn the last PDCCH miss check in the SCC, but it is not known whether it is all detected and all correct in the PCC, or the last one is missed and all detected are correct. Otherwise, if used in the PCC The PUCCH corresponding to the last detected PDCCH will also have the same problem on the SCC.
  • the inventors found in the process of implementing the present invention that the existing bundling technology has the following defects: In the CA TDD system, there are many correctly received data in all bundling. It is also retransmitted, as shown in Figure 4. In time domain bundling, there is currently no way to solve the problem of missed detection of the last PDCCH in time domain bundling. Summary of the invention
  • the object of the embodiments of the present invention is to provide a method for transmitting an uplink response signal, a terminal device, a base station, and a communication system, which can avoid unnecessary retransmission in all bundles, and can solve the problem of missed detection of the last PDCCH in time domain bundling. .
  • a method for transmitting an uplink response signal comprising:
  • Detecting the received downlink data to obtain indication information that the downlink data is correctly received, received incorrectly, or does not receive any control information, and is based on the detected primary component carrier and secondary component carrier of the downlink data. Allocating corresponding uplink resources;
  • the indication information obtained by detecting on the secondary component carrier, and the position and quantity of the correctly received indication information in the indication information sequence are used to generate an uplink response signal, and determining to feed back the uplink response signal Uplink resources used;
  • Another aspect of an embodiment of the present invention provides a method of transmitting an uplink response signal, the method comprising:
  • the base station If the base station receives the uplink response signal fed back by the terminal device on the uplink resource, the base station selectively retransmits the downlink data according to the uplink response signal fed back on the uplink resource; if the base station does not receive the terminal device The uplink response signal is fed back, and the base station retransmits all downlink data.
  • a terminal device is provided, the terminal device Includes:
  • a first receiving unit configured to receive downlink data that is sent by the base station by using a primary component carrier and a secondary component carrier according to a predetermined sequence
  • a first processing unit configured to detect the downlink data received by the first receiving unit, to obtain indication information that the downlink data is correctly received, received incorrectly, or does not receive any control information, and according to the detected
  • the primary component carrier and the secondary component carrier where the downlink data is located are allocated corresponding uplink resources;
  • a sorting unit configured to perform, according to an order in which the base station sends the downlink data, the indication information obtained by the processing unit to obtain an indication information sequence
  • a signal generating and resource determining unit configured to generate, according to the indication information obtained by detecting on the secondary component carrier, and the position and quantity of the correctly received indication information in the indication information sequence, generating an uplink response signal in the indication information sequence And determining an uplink resource used to feed back the uplink response signal;
  • the signal sending unit is configured to send the uplink response signal to the base station by using the uplink resource determined by the signal generating and resource determining unit, so that the base station determines downlink data that needs to be retransmitted according to the uplink response signal.
  • a base station includes: a first sending unit, configured to send downlink data to a terminal device by using a primary component carrier and a secondary component carrier according to a predetermined sequence;
  • a third determining unit configured to determine whether the downlink data received by the terminal device according to the downlink data sent by the first sending unit is correctly received, received incorrectly, or not received on the uplink resource An uplink response signal fed back to the indication information sequence of the indication information of any control information;
  • a first retransmission unit configured to: when the third determining unit determines that the uplink response signal is received on an uplink resource, selectively retransmit downlink data according to the uplink response signal fed back on the uplink resource .
  • a communication system comprising the above base station and a terminal device.
  • a method for transmitting an uplink response signal comprising: Receiving downlink data sent by the base station through the primary component carrier and the secondary component carrier in a predetermined order;
  • Downlink allocation indication value DAI Downlink allocation indication value
  • the secondary component Determining the used modulation symbol by the mapping result of the bundling result on the carrier and the modulation symbol; or the downlink corresponding to the last correctly received indication information in the continuously detected correctly received indication information on the secondary component carrier Assigning the indication value DAI, and the preset downlink allocation indication value DAI, the mapping relationship between the binding result on the secondary component carrier and the modulation symbol to determine the modulation symbol used; according to the obtained binding result, and the preset binding result and And a mapping relationship between the modulation symbol and the uplink resource to determine an uplink resource that sends the modulation symbol; the uplink resource indicates that the last one of the correctly received indication information continuously detected on the primary component carrier or the secondary component carrier is correctly received Corresponding uplink resources;
  • Another aspect of an embodiment of the present invention provides a method of transmitting an uplink response signal, the method comprising:
  • the base station receives, on the uplink resource, the modulation symbol that is sent by the terminal device according to the detected downlink data, the base station according to the received modulation symbol and the preset downlink allocation indication value DAI, Determining a downlink allocation indication value DAI by a mapping relationship between the binding result on the component carrier and the modulation symbol;
  • the downlink allocation indication value DAI indicates the last downlink assignment indication value DAI detected by the terminal device on the secondary component carrier, or indicates that the terminal device continuously detects the correctly received indication information on the secondary component carrier.
  • the base station selectively retransmits the downlink data according to the determined downlink allocation indication value DAI and the uplink resource.
  • a terminal device where the terminal device includes:
  • a second receiving unit configured to receive downlink data that is sent by the base station by using the primary component carrier and the secondary component carrier according to a predetermined sequence
  • a second processing unit configured to detect the downlink data received by the second receiving unit, to obtain indication information that the downlink data is correctly received, received incorrectly, or does not receive any control information, and obtains an indication of the main a downlink assignment indication value DAI for transmitting the downlink data on the component carrier and the secondary component carrier;
  • a bundling unit configured to perform time domain bundling on the detection results of the primary component carrier and the secondary component carrier respectively;
  • a first symbol determining unit configured to map, according to a last one of the downlink allocation indication value DAI detected on the secondary component carrier, and a preset downlink allocation indication value DAI, a binding result on a secondary component carrier, and a modulation symbol Relationship determining the used modulation symbol; or the downlink assignment indication value DAI corresponding to the last correctly received indication information in the continuously detected correctly received indication information on the secondary component carrier, and a preset downlink Allocating the indication value DAI, the mapping relationship between the bundling result on the secondary component carrier and the modulation symbol to determine the modulation symbol used;
  • a resource determining unit configured to determine, according to a bundling result obtained by the bundling unit, and a mapping relationship between a preset bundling result and a modulation symbol and an uplink resource, an uplink resource that sends the modulation symbol; where the uplink resource is represented by the primary component carrier or An uplink resource corresponding to the last correctly received indication information of the correctly received indication information continuously detected on the secondary component carrier; the second sending unit, configured to send the modulation symbol to the base station on the determined uplink resource, so that The base station selectively retransmits downlink data based on the modulation symbols received on the uplink resource.
  • a base station includes: a second sending unit, configured to pass a primary component carrier and a secondary component carrier in a predetermined order Sending downlink data to the terminal device;
  • a second indication value determining unit configured to receive, according to the received modulation symbol, and the preset downlink allocation indication value, when the terminal device receives the modulation symbol that is fed back by the terminal device according to the received downlink data.
  • DAI a mapping relationship between the bundling result on the secondary component carrier and the modulation symbol to determine a downlink allocation indication value DAI;
  • the downlink allocation indication value DAI indicates the last downlink assignment indication value DAI detected by the terminal device on the secondary component carrier, or indicates that the terminal device continuously detects the correctly received indication information on the secondary component carrier.
  • a second retransmission unit configured to selectively retransmit the downlink data according to the downlink allocation indication value DAI determined by the second indication value determining unit and the uplink resource.
  • a communication system including the above-described base station and terminal device is provided.
  • a computer readable program wherein when the program is executed in a base station, the program causes a computer to perform the above method of transmitting an uplink response signal in the base station.
  • a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform the above method of transmitting an uplink response signal in a base station.
  • a computer readable program wherein when the program is executed in a terminal device, the program causes the computer to execute the above method of transmitting an uplink response signal in the terminal device.
  • a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform the above method of transmitting an uplink response signal in a terminal device.
  • the beneficial effects of the embodiments of the present invention are: by sorting the detection results on the PCC and the SCC, and generating an uplink response signal according to a pre-established rule, thereby avoiding unnecessary retransmissions during all bundling; Mapping relationship to determine time domain bundling
  • the transmitted modulation symbol and the uplink resource for transmitting the modulation symbol can solve the problem of the last PDCCH miss detection in the time domain bundling.
  • FIG. 1 is a schematic diagram of resource allocation in a carrier aggregation system in the prior art
  • FIG. 2 is a schematic diagram of a configuration manner that can be selected in an LTE TDD system
  • Figure 3A is a schematic diagram of all the binding modes for the CA TDD system
  • 3B is a schematic diagram of a time domain bundling method for a CA TDD system
  • Figure 4 and Figure 5 are schematic diagrams of missed detection when all bundles are present
  • Figure 6 is a schematic diagram of a missed detection when time domain bundling occurs
  • FIG. 7 is a flowchart of a method for transmitting an uplink response signal according to Embodiment 1 of the present invention
  • FIG. 8 and FIG. 9 are diagrams showing an example of sorting detection results according to a DAI value in Embodiment 1 of the present invention
  • FIG. 10 is a flowchart of a method for transmitting an uplink response signal according to Embodiment 2 of the present invention
  • FIG. 11 is a flowchart of a method for transmitting an uplink response signal according to Embodiment 3 of the present invention
  • FIG. 12 is a flowchart of step 1005 of Embodiment 3 of the present invention.
  • FIG. 13 is a flowchart of an implementation method of steps 1202 and 1204 in Embodiment 3 of the present invention
  • FIG. 14 and FIG. 15 are schematic diagrams of Application Example 2 in Embodiment 3 of the present invention
  • FIG. 17 is a schematic diagram of an application example 3 in Embodiment 3 of the present invention
  • FIG. 19 are schematic diagrams of an application example 4 in Embodiment 3 of the present invention
  • FIG. 20 and FIG. 21 are application examples in Embodiment 3 of the present invention.
  • Schematic diagram of 5; 22 and 23 are schematic views of an application example 6 in Embodiment 3 of the present invention
  • FIGS. 24 and 25 are schematic views of an application example 7 in Embodiment 3 of the present invention
  • FIG. 26 and FIG. 27 are Embodiment 3 of the present invention.
  • FIG. 28 and FIG. 29 are schematic diagrams of an application example 9 in Embodiment 3 of the present invention
  • FIG. 30 and FIG. 31 are schematic diagrams of an application example 10 in Embodiment 3 of the present invention
  • FIG. 34 is a schematic diagram of the application example 12 in the embodiment 3 of the present invention.
  • FIG. 36 is a detection result of the terminal device detecting the downlink data sent from the base station.
  • 37 is a schematic diagram of a sequence of indication information obtained by sorting the detection results shown in FIG. 36 according to the DAI value;
  • FIG. 38A to 38C are schematic diagrams showing a correspondence relationship between a QPSK modulation symbol and a response signal; and FIG. 39 is a schematic diagram showing the configuration of a terminal device according to Embodiment 4 of the present invention.
  • Figure 40 is a diagram showing the configuration of a signal generation and resource determining unit 3904 in Embodiment 4 of the present invention.
  • Figure 41 is a block diagram showing the structure of a base station according to Embodiment 5 of the present invention.
  • Figure 42 is a block diagram showing the configuration of a communication system according to Embodiment 6 of the present invention.
  • FIG. 43 is a flowchart of a method for transmitting an uplink response signal according to Embodiment 7 of the present invention
  • FIG. 44 is a flowchart of a method for transmitting an uplink response signal according to Embodiment 8 of the present invention
  • FIG. 45 is a schematic diagram of an application example of the present invention
  • Figure 46 is a block diagram showing the structure of a terminal device according to Embodiment 9 of the present invention.
  • Figure 47 is a block diagram showing the structure of a base station according to Embodiment 10 of the present invention.
  • FIGS. 48A to 48D are schematic views of an application example 3 in the embodiment 10 of the present invention.
  • Fig. 49 is a schematic view showing an application example 4 in the embodiment 10 of the invention. detailed description
  • Example 1 An embodiment of the present invention provides a method for transmitting an uplink response signal. As shown in FIG. 7, the method includes:
  • Step 701 Receive downlink data that is sent by the base station by using a primary component carrier and a secondary component carrier according to a predetermined sequence.
  • Step 702 Perform detection on the received downlink data, to obtain indication information that the downlink data is correctly received, received incorrectly, or does not receive any control information, and according to the detected primary component carrier where the downlink data is located, Sub-component carriers are used to allocate corresponding uplink resources;
  • Step 703 the indication information obtained by the detection is arranged according to the sequence in which the base station sends the downlink data, to obtain an indication information sequence;
  • Step 704 Generate, according to the indication information sequence, the indication information obtained by detecting on the secondary component carrier, and the position and quantity of the correctly received indication information in the indication information sequence, to generate an uplink response signal, and determine feedback Uplink resource used by the uplink response signal.
  • Step 705 Send the uplink response signal to the base station by using the determined uplink resource, so that the base station determines downlink data that needs to be retransmitted according to the uplink response signal.
  • the DAI value transmitted in the PDCCH may be used to indicate the sequence.
  • the DAI value is used to record the number of PDCCHs that the base station cumulatively transmits, in order.
  • the DAI can be 0, 1, 2, ..., etc.
  • the DAI value is first CC, and the subsequent subframe is counted cumulatively. For example, as shown in FIG.
  • the indication manner is not limited, and the transmission order may be indicated in other manners.
  • the received downlink data is detected to obtain indication information that the downlink data is correctly received, received incorrectly, or does not receive any control information, and specifically includes:
  • the downlink data to be decoded is decoded, and the downlink data is correctly received, received incorrectly, or received no control information according to the decoded result.
  • the indication information for correctly receiving the downlink data may be ACK, and the downlink data is incorrectly received.
  • the indication information may be NACK, and the indication information that does not receive any control information may be DTX;
  • the primary component carrier and the secondary according to the detected downlink data The component carrier is used to allocate the corresponding uplink resource, and the method shown in FIG. 1 in the background art may be adopted, where the implicit allocation mode is adopted on the PCC, and the explicit allocation mode and the specific uplink resource allocation mode are adopted on the SCC. As described in the background art, it will not be described again here.
  • the uplink resource may be a PUCCH, but it is only an embodiment of the present invention.
  • the user equipment UE can obtain the detection result of detecting the downlink data, such as ACK, NACK, DTX, and the corresponding PUCCH; the DAI value sent by the base station through the PDCCH.
  • the downlink data such as ACK, NACK, DTX, and the corresponding PUCCH
  • the user equipment UE may sort the detection results according to the DAI value sent by the base station to obtain a sequence of indication information; for example, the detection result shown in FIG. 4 is sorted according to the DAI.
  • the obtained instruction information sequence is as shown in FIG.
  • the binding result is also NACK, and thus, The user equipment UE still feeds back the NACK to the base station.
  • the base station receives the NACK, it retransmits all the downlink data, causing unnecessary data retransmission and reducing data transmission efficiency.
  • the indication information obtained by detecting on the secondary component carrier, and the position and quantity of the correctly received indication information in the indication information sequence are Generating an uplink response signal, and determining an uplink resource used for feeding back the uplink response signal;
  • the generated uplink response signal is used to indicate the direction, and the detection result of detecting the downlink data in the direction indicated by the uplink response signal is ACK, so that when the base station receives the uplink resource, In the uplink response signal, the downlink data correctly received by the user equipment UE may be determined, thereby determining downlink data that needs to be retransmitted, and unnecessary data retransmission is avoided.
  • the uplink response signal generated in step 704 may be an indication signal indicating a forward direction, the indication signal indicating the forward direction is from the start of the correctly received indication information to the last correct reception in the forward direction.
  • the downlink data related to the consecutive N correctly received indication information is correctly received; N is a positive integer greater than or equal to 1; wherein the initially correctly received indication information refers to the number sent to the base station
  • the uplink resource corresponding to the correctly received indication information is PUCCH0 as shown in FIG. 8.
  • the uplink response signal generated in step 704 may be an indication signal indicating a backward direction, the indication signal indicating the backward direction is from the indication information correctly received from the end position to the last one in the backward direction.
  • the downlink data related to the consecutive M correctly received indication information that is received by the received indication information is correctly received; M is a positive integer greater than or equal to 1; wherein the end position refers to the last physical location, that is, the downlink can be transmitted The location of the last downstream resource of the data.
  • the signal such as NACK
  • the used uplink resource is determined to be the uplink resource PUCCH2 corresponding to the last correctly received indication information in the backward direction.
  • the base station receives the indication signal NACK in the backward direction on the PUCCH2
  • Downstream data Since the position corresponding to the last ACK is not the physical end position in Fig. 8, the indication signal in the backward direction is not generated.
  • the ACK is used to indicate the indication signal in the forward direction
  • the NACK is used to indicate the indication signal in the backward direction.
  • the present invention is not limited to the above embodiment, and any other indication information may be used to indicate the indication in the forward or backward direction. signal. It can be seen from the above embodiment that the detection results on the PCC and the SCC are sorted, and according to the indication information sequence, the indication information corresponding to the detection on the SCC and the correctly received indication information are in the indication information sequence.
  • the position and the quantity are used to generate an uplink response signal indicating the direction, so that after receiving the uplink response signal, the base station can determine the downlink data that is correctly received, so as to further determine the downlink data that needs to be retransmitted, therefore, the base station can avoid Unnecessary data retransmission when all bundles are used to improve data transmission efficiency.
  • An embodiment of the present invention provides a method for transmitting an uplink response signal. As shown in FIG. 10, the method includes:
  • Step 1001 The base station sends downlink data to the user equipment by using a primary component carrier and a secondary component carrier according to a predetermined sequence.
  • Step 1002 If the base station receives the uplink response signal fed back by the user equipment on the uplink resource, the base station selectively retransmits the downlink data according to the uplink response signal fed back on the uplink resource.
  • the base station if the base station does not receive the uplink response signal fed back by the user equipment within a preset time, the base station retransmits all downlink data.
  • the uplink response signal received by the base station may be an ACK or a NACK as described in Embodiment 1, and the meaning of the response signal is as described in Embodiment 1, and details are not described herein again.
  • the base station sends downlink data to the user equipment UE by using the primary component carrier and the secondary component carrier according to a predetermined sequence.
  • the user equipment UE receives the downlink data, and the downlink is performed.
  • the data is detected to obtain a correct reception indication information ACK indicating that the downlink data is correctly received, an indication information NACK that is erroneously received, and indication information DTX that does not receive any control information, and obtain a DAI value indicating a transmission order; then the user equipment
  • the UE sorts the detection result according to the DAI value to obtain a sequence of indication information; and the user equipment UE determines the feedback uplink response signal and the uplink resource that transmits the uplink response signal.
  • the direction from the first indication information to the last indication information in the indication information sequence indicates the forward direction, and the opposite direction indicates the backward direction, and the following specified direction is taken as an example. The description is made, but it is only an embodiment, and vice versa. In this way, the user equipment UE can generate the correct receiving indication signal ACK forward or correctly.
  • the indication signal NACK is received, as described in Embodiment 1, and details are not described herein again.
  • step 1002 when the base station receives the forward correct reception indication signal ACK fed back by the user equipment UE on the uplink resource, the base station may determine the indication signal ACK for transmitting the forward direction.
  • the downlink data of the downlink resource corresponding to the uplink resource and the downlink data of the S1 downlink resources that are successively transmitted from the downlink resource are correctly received by the user equipment UE; thus, the base station determines to retransmit other downlink resources (not uplinked)
  • the downlink data of the transmission indicated by the response signal wherein, S1 is an integer greater than or equal to.
  • step 1002 when the base station receives the backward correct reception indication signal NACK fed back by the user equipment UE on the uplink resource, the base station may determine the indication signal ACK for transmitting the backward direction.
  • the downlink data of the downlink resource corresponding to the uplink resource and the downlink data of the S2 downlink resources that are forwarded from the downlink resource are all correctly received by the user equipment UE; thus, the base station determines to retransmit other downlink resources (not uplinked)
  • the downlink data of the transmission indicated by the response signal wherein, S2 is an integer greater than or equal to.
  • the base station can determine downlink data that needs to be retransmitted according to the uplink response signal fed back on the uplink resource. Therefore, the base station only needs to retransmit downlink data that is not indicated by the uplink response signal, thereby avoiding all Unnecessary data retransmission during bundling, improving data transmission efficiency.
  • An embodiment of the present invention provides a method for transmitting an uplink response signal. As shown in FIG. 11, the method includes:
  • Step 1101 The base station sends downlink data to the user equipment by using a primary component carrier and a secondary component carrier according to a predetermined sequence.
  • the base station sends the downlink data in a predetermined order.
  • the DAI value that can be transmitted in the PDCCH indicates the order of transmission.
  • Step 1102 The user equipment UE receives downlink data that is sent by the base station by using a primary component carrier and a secondary component carrier according to a predetermined sequence.
  • Step 1103 The user equipment UE detects the received downlink data to obtain indication information that the downlink data is correctly received, received incorrectly, or does not receive any control information, and is based on the detected downlink data.
  • a primary component carrier and a secondary component carrier are used to allocate corresponding uplink resources; The specific process is as described in Embodiment 1, and details are not described herein again.
  • Step 1104 The user equipment UE arranges the indication information obtained by the detection according to the sequence in which the base station sends the downlink data, to obtain a sequence of indication information.
  • Step 1105 The user equipment UE generates an uplink response signal according to the position information and the number of the indication information obtained by the detection on the secondary component carrier and the correctly received indication information in the indication information sequence. And determining an uplink resource used for feeding back the uplink response signal;
  • Step 1106 The user equipment UE sends the uplink response signal to the base station by using the determined uplink resource.
  • Step 1107 If the base station receives the uplink response signal fed back by the user equipment, the base station selectively retransmits the downlink data according to the uplink response signal fed back on the uplink resource.
  • the base station retransmits all downlink data.
  • FIG. 12 is a flowchart of a method for implementing step 1005 in Embodiment 3 of the present invention. As shown in FIG. 12, the method includes:
  • Step 1201 Determine, in the sequence of the indication information, that the number of indication information obtained by detecting on the secondary component carrier is 1 or greater than 1.
  • Step 1202 If it is determined in step 1201 that the number of indication information obtained by detecting on the SCC is 1, generating an uplink response signal according to the position and quantity of the correctly received indication information in the indication information sequence, and determining the feedback.
  • the uplink resource used by the uplink response signal If it is determined in step 1201 that the number of indication information obtained by detecting on the SCC is 1, generating an uplink response signal according to the position and quantity of the correctly received indication information in the indication information sequence, and determining the feedback.
  • the uplink resource used by the uplink response signal is used by the uplink response signal.
  • Step 1203 If it is determined in step 1201 that the number of indication information obtained by detecting on the SCC is greater than 1, further determining whether the uplink resources allocated on the SCC are the same.
  • Step 1204 If it is determined in step 1204 that the allocated uplink resources are different, generating an uplink response signal according to the position and quantity of the correctly received indication information in the indication information sequence, and determining to feed back the uplink response signal. Uplink resources used.
  • Step 1205 if it is determined in step 1203 that the allocated uplink resources are the same, then according to The indication information obtained by detecting on the secondary component carrier, the position and the quantity of the correctly received indication information in the indication information sequence are used to generate an uplink response signal, and determining an uplink resource used for feeding back the uplink response signal.
  • step 1202 and step 1204 are a flowchart of a method for implementing step 1202 and step 1204 in Embodiment 3 of the present invention; wherein, the processing manner of the foregoing case may refer to the processing manner of all bindings in the TDD system of Rel. 8, for example, the application number is PCT. /CN2010/076603, the entire disclosure of which is hereby incorporated by reference in its entirety in its entirety in the the the the the the the the the the the the the the the the the the the the the
  • steps 1202 and 1204 is briefly described with reference to FIG. 13, as shown in FIG. 13, including:
  • Step 1303 generating a first indication signal, and determining an uplink resource that feeds back the first indication signal, where the first indication signal is the uplink response signal; the first indication signal indicates starting with an ACK from the beginning, All consecutive ACK related downlink data in the forward direction are correctly received; and it is determined that the last ACK of at least one ACK that is consecutive in the forward direction starts from the start of the correctly received indication information ACK
  • the PUCCH feeds back the first indication signal, where the first indication signal may be referred to as a forward correct reception signal, and may be represented by an ACK, but is not limited thereto, and may be represented by other indicators;
  • the base station when the base station receives the forward correct reception signal on the PUCCH, it can be determined that all indication information (including the last indication information) that is continuous from the last indication information and that is continuous in the backward direction is an ACK. Gp, the base station can know that all downlink data related to these consecutive ACKs are correctly received, and thus retransmitting the rest is not determined as ACK Downstream data.
  • Step 1304 if it is determined in step 1301 that the indication information sequence does not start with an ACK, further determining whether the indication information sequence ends with an ACK; if the determination result is yes, executing step 1305, otherwise 1307;
  • Step 1305 determining that the end position refers to a physical end position, that is, the resource corresponding to the last ACK is the last resource in the downlink resource capable of transmitting downlink data; if the determination result is yes, performing step 1306, otherwise 1307.
  • Step 1306 generating a second indication signal, and determining an uplink resource that feeds back the first indication signal, where the second indication signal is the uplink response signal; the second indication signal indicates starting from an ACK at an end position, All ACK-related downlink data that are consecutive in the backward direction are correctly received; and it is determined that the second indication signal is fed back from the ACK at the end position and on the PUCCH corresponding to the last ACK in the backward direction.
  • the second indication signal may be referred to as a backward received signal correctly, and may be represented by N, but is not limited thereto, and may be represented by other indicators.
  • the base station when the base station receives the backward correct received signal on the PUCCH, it can be determined that all indication information (including the last indication information) that is continuous in the forward direction from the last indication information is ACK. Gp, the base station can know that all downlink data related to these consecutive ACKs are correctly received, and thereby retransmit the remaining downlink data not indicated by the uplink response signal.
  • Steps 1307 and 1308, the user equipment UE does not generate an uplink response signal, and does not feed back any information.
  • the uplink response signal may be generated in the order shown in FIG. 13, but it is only an embodiment of the present invention.
  • the determination order may be determined according to actual needs and the response may be generated.
  • the response signal for example, may first determine whether the ACK is at the end position or the like.
  • the indication information related to the transport block in the last downlink subframe is an ACK (ie, a physical end position), whether each ACK is continuous with each other, the number of consecutive ACKs, and the like) generates an uplink response signal ACK or NACK.
  • the upswing The signal should include information indicating the direction, for example, ACK indicates that the downlink data transmitted on all consecutive downlink resources in the backward direction is correctly received starting from the downlink resource associated with the PUCCH transmitting the uplink response signal ACK, NACK It is indicated that the downlink data transmitted on all consecutive downlink resources in the forward direction starting from the downlink resource related to the PDCCH transmitting the uplink response signal NACK is correctly received.
  • whether the ACK in the indication information sequence is continuous may be determined according to the DAI value, and if the DAI value is continuous, the ACK is continuous.
  • any other form of information may be used to represent the uplink response information, and different uplink response signals may be specified to represent different meanings according to actual needs. Further, it is also possible to determine by which PUCCH the uplink response signal is transmitted based on the above-described positional relationship. For example, in the present embodiment, the uplink response information is transmitted by the PUCCH corresponding to the downlink data related to the last ACK in the consecutive ACKs. Of course, other PUCCHs may also be determined according to actual needs to transmit uplink response information, and it may be specified that different PUCCH transmissions will be used to inform the BS of different information.
  • the user equipment UE can notify the base station of different information by selecting a different PUCCH and transmitting an ACK/NACK as an uplink response signal on the PUCCH. Therefore, the base station can retransmit the downlink data that is not indicated by the uplink signal according to the uplink response signal fed back by the user equipment UE, and avoid unnecessary retransmission.
  • the base station sends downlink data to the user equipment UE through the PCC and the SCC in the sequence shown in FIG. 4, and the user equipment UE detects the downlink data, and obtains the indication information ACK or the error of correctly receiving the downlink data.
  • the user equipment UE may generate an uplink response signal according to the ACK position and number in the information sequence.
  • the ACK is located at the beginning of the sequence, and the ACK is sent to the base station.
  • the uplink resource of the signal is PUCCH0.
  • the end position is not the last resource in the downlink resource capable of transmitting downlink data, and thus the forward correct reception signal ACK is generated.
  • FIG. 14 is a schematic diagram showing detection results of user equipment detecting downlink data transmitted from a base station; and FIG. 15 is a schematic diagram showing sequence of indication information obtained by sorting according to obtained DAI values.
  • the base station sends the downlink data to the user equipment UE through the PCC and the SCC in the sequence shown in FIG. 14, and the user equipment UE detects the downlink data, and obtains the indication information ACK for correctly receiving the downlink data or the indication information of the erroneously receiving the downlink data.
  • NACK or other indication information, such as indication information DTX that does not receive any control data; then the user equipment UE sorts the detection results according to the DAI value, as shown in FIG.
  • the user equipment UE can generate an uplink response signal based on the ACK position and number in the information sequence.
  • Example 3 16 is a schematic diagram showing a detection result of detecting downlink data transmitted from a base station by a user equipment; and FIG. 17 is a sequence diagram of instruction information obtained by sorting the detection results shown in FIG. 16 according to a DAI value.
  • the base station sends the downlink data to the user equipment UE through the PCC and the SCC in the sequence shown in FIG. 16, and the user equipment UE detects the downlink data, and obtains the indication information ACK for correctly receiving the downlink data or the indication information of the erroneously receiving the downlink data.
  • NACK or other indication information, such as indication information DTX that does not receive any control data; then the user equipment UE sorts the detection results according to the DAI value, as shown in FIG.
  • the user equipment UE can generate an uplink response signal based on the ACK position and number in the information sequence.
  • the ACK is located at the end of the sequence and is the location corresponding to the last downlink resource. If there are 3 ACKs in the backward direction, a backward received signal NACK is generated, and the signal is determined to be transmitted.
  • FIG. 18 is a schematic diagram showing detection results of detection of downlink data transmitted from a base station by a user equipment; and FIG. 19 is a sequence diagram of instruction information obtained by sorting the detection results shown in FIG. 16 according to DAI values.
  • the base station sends the downlink data to the user equipment UE through the PCC and the SCC in the sequence shown in FIG. 18, and the user equipment UE detects the downlink data, and obtains the indication information ACK for correctly receiving the downlink data or the indication information of the erroneously receiving the downlink data.
  • the user equipment UE can generate an uplink response signal based on the ACK location and number in the sequence of information.
  • the user equipment UE may be based on the information sequence.
  • the ACK position and number are used to generate an uplink response signal.
  • the indication information obtained by detecting on the SCC is greater than 1 and the DAI value is continuous, and corresponding to the same PDCCH
  • the indication information obtained by detecting on the SCC needs to be correctly received.
  • the indication information generates an uplink response signal at the position and number of the indication information sequence.
  • the indication information sequence starts with an ACK
  • the PUCCH on the SCC can feed back the uplink response signal; otherwise, the last one of the ACKs that are consecutively received in the forward direction from the first ACK before the PUCCH on the SCC
  • the PUCCH corresponding to the ACK feeds back the uplink response signal.
  • the PUCCH on the SCC can only be obtained when the detection result obtained by detecting the downlink data in the SCC is ACK.
  • the uplink response signal is fed back; No. IJ, the PUCCH feedback uplink response signal corresponding to the last ACK in the ACK consecutively received in the backward direction from the first ACK after the PUCCH on the SCC.
  • FIG. 20 is a schematic diagram showing a detection result of detecting downlink data transmitted from a base station by a user equipment
  • FIG. 21 is a schematic diagram showing a sequence of indication information obtained by sorting the detection results shown in FIG. 20 according to a DAI value.
  • the base station sends the downlink data to the user equipment UE through the PCC and the SCC in the sequence shown in FIG. 20, and the user equipment UE detects the downlink data, and obtains the indication information ACK for correctly receiving the downlink data or the indication information of the erroneously receiving the downlink data.
  • the user equipment UE generates an uplink response signal in the position and number of the indication information sequence according to the indication information detected on the SCC and the correctly received indication information.
  • Figure 22 is a schematic diagram showing the detection result of the user equipment detecting the downlink data transmitted from the base station; and Figure 23 is a diagram showing the sequence of the indication information obtained by sorting the detection results shown in Figure 22 based on the DAI value.
  • the difference between the example 6 and the example 5 is that the indication information obtained by detecting on the SCC is not all ACK, as shown in FIGS. 22 and 23, ACK, NACK.
  • the processing manner is as described above, and details are not described herein again.
  • Figure 24 is a schematic diagram showing the detection result of the detection of the downlink data transmitted from the base station by the user equipment; and Figure 25 is a sequence diagram of the indication information obtained by sorting the detection results shown in Figure 24 based on the DAI value.
  • This example 7 differs from example 5 in that the ACK is located at the end of the information indication sequence. As shown in FIG. 25, the ACK is located at the end of the sequence, and the end position is the last downlink resource capable of transmitting downlink data, and there are 3 ACKs in the backward direction, and the two downlink data transmitted on the SCC are both If the indication information corresponding to the SCC is ACK, the backward received signal NACK is generated, and the uplink resource that transmits the signal is determined to be the uplink resource PUCCH2 corresponding to the last ACK.
  • FIG. 26 is a schematic diagram showing a detection result of detecting downlink data transmitted from a base station by a user equipment
  • FIG. 27 is a schematic diagram showing an instruction information sequence obtained by sorting the detection results shown in FIG. 26 according to a DAI value
  • the difference between the example 8 and the example 7 is that the indication information obtained by detecting on the SCC is not all ACK, as shown in FIGS. 26 and 27, NACK, ACK.
  • the processing manner is as described above, and details are not described herein again.
  • the foregoing example 5-8 is a case where the number of indication information obtained by detecting on the SCC is greater than 1 and the DAI value is continuous and corresponds to the same PDCCH.
  • the following describes the case where the DAI value obtained by detecting on the SCC is discontinuous, and the description is required.
  • the following rules need to be considered:
  • the indication information sequence starts with an ACK
  • the PUCCH on the SCC can feed back the uplink response signal; otherwise, the last one of the ACKs that are consecutively received in the forward direction from the first ACK before the PUCCH on the SCC
  • the PUCCH corresponding to the ACK feeds back the uplink response signal.
  • the PUCCH on the SCC can only be obtained when the detection result obtained by detecting the downlink data in the SCC is ACK.
  • the uplink response signal is fed back; No. IJ, the PUCCH feedback uplink response signal corresponding to the last ACK of the ACKs that are consecutively received in the backward direction after the PUCCH on the SCC, starting from the ACK at the end position.
  • FIG. 28 is a schematic diagram showing a detection result of detecting downlink data transmitted from a base station by a user equipment
  • FIG. 29 is a schematic diagram showing an instruction information sequence obtained by sorting the detection results shown in FIG. 28 according to a DAI value
  • Example 5 The difference from Example 5 is that the DAI value in the SCC is not continuous.
  • FIG. 30 is a schematic diagram showing detection results of detecting downlink data transmitted from a base station by a user equipment
  • FIG. 31 is a schematic diagram showing sequence of indication information obtained by sorting the detection results shown in FIG. 30 according to DAI values
  • the difference from the example 9 is that the indication information obtained by the detection on the SCC is not all ACK, as shown in Figures 30 and 31, ACK, NACK.
  • the last ACK in the ACK corresponds to PUCCH2. Since it is not necessary to use the corresponding PUCCH1 on the SCC, it is handled as usual.
  • FIG. 32 is a schematic diagram showing detection results of detecting downlink data transmitted from a base station by a user equipment
  • FIG. 33 is a schematic diagram showing sequence of indication information obtained by sorting the detection results shown in FIG. 32 according to DAI values
  • PUCCH1 is needed.
  • the indication information obtained by detecting on the SCC is not all ACK, but ACK, NACK, as shown in FIG. 32 and FIG.
  • FIG. 34 is a schematic diagram showing a detection result of detecting downlink data transmitted from a base station by a user equipment
  • FIG. 35 is a schematic diagram showing sequence of indication information obtained by sorting the detection results shown in FIG. 34 according to a DAI value
  • the ACK is located at the end of the sequence, and the end position is the last downlink resource capable of transmitting downlink data, and PUCCH1 is needed, in which case the indication information obtained by detecting on the SCC is used. Not all ACKs, but NACK, ACK.
  • the PUCCH3 corresponding to the last ACK in the ACK that is correctly received in the backward direction.
  • the above embodiment is described by taking an ACK at the beginning or the end of the indication information sequence, where the end position refers to the location of the last downlink resource capable of transmitting downlink data, and the ACK of the start bit is the first transmission to the base station.
  • step 1302 the following steps (not shown) may be further included: determining whether the ACK is at the end position, and if the determination result is yes, determining from Whether the first number of indication information continuously received in the forward direction at the beginning of the correctly received indication information at the beginning of the indication information sequence is greater than or equal to the end of the correctly received indication information located at the end of the indication information sequence a second number of indication information that is continuously received in the backward direction in the backward direction;
  • the third indication signal is the uplink response signal; wherein the third indication signal indicates the correct reception from the start position
  • the indication information starts, and the downlink data related to the consecutive N2 correctly received indication information ending in the last correctly received indication information in the forward direction is correctly received; N2 is a positive integer greater than or equal to 1; Determining, by the uplink resource corresponding to the last correctly received indication information in the forward direction, the third indication signal;
  • the fourth indication signal is the uplink response signal; wherein the fourth indication signal indicates that the correct reception is from the end position
  • M2 is a positive integer greater than or equal to 1;
  • the uplink resource corresponding to the last correctly received indication information in the backward direction feeds back the fourth indication signal.
  • FIG. 36 is a schematic diagram showing a detection result of detecting downlink data transmitted from a base station by a user equipment
  • FIG. 37 is a schematic diagram showing an instruction information sequence obtained by sorting the detection results shown in FIG. 36 according to a DAI value
  • the ACK is located at the beginning and the end of the sequence, and the number of consecutive ACKs starting from the first ACK in the forward direction is 1; and starting from the last ACK, in the backward direction
  • the number of consecutive ACKs in the direction is 3; in this case, an uplink response signal NACK is generated, indicating that the correct reception is started from the correctly received indication information at the end position, and the last correct reception is made in the backward direction.
  • the downlink data related to the consecutive 3 correctly received indication information ends correctly received; the uplink resource PUCCH2 corresponding to the last correctly received indication information in the backward direction is determined to be NACKo
  • the uplink resource feedback ACK corresponding to the last correctly received indication information in the direction.
  • the amount of data to be retransmitted can be minimized.
  • the BPSK modulation symbol is applied to transmit the uplink response signal ACK or NACK, and the base station and the user equipment pre-arrange the mapping relationship between the modulation symbol and the response signal. In this case, only two states can be fed back. As shown in Table 1, when the modulation symbol is 1, it corresponds to ACK. When the modulation symbol is 0, it corresponds to NACK.
  • QPSK modulation symbols can also be used, so that there are four states, as shown in Table 2.
  • the ACK is represented by the QPSK modulation symbol (1, 1), and the meaning is the same as the above embodiment; and the QPSK modulation symbols (0, 1), (1, 0), and (0, 0) represent NACK, respectively; , 0) corresponds to "0" in BPSK, indicating that the downlink data from the position of the feedback uplink signal to the last physical position is correctly received, as shown in Fig. 38A; (0, 1) represents the uplink signal in the feedback The downlink data from the position to the penultimate physical location is correctly received, as shown in FIG. 38B;
  • (1,0) indicates that the downlink data from the position of the feedback uplink signal to the third physical position of the last is correctly received, as shown in Fig. 38C.
  • these QPSK modulation symbols can also be used to indicate other meanings.
  • the corresponding ACK can be feedback not at the beginning of the indication information sequence or at the end of the indication information, so that the base station avoids unnecessary data retransmission and improves transmission efficiency.
  • the embodiment of the invention further provides a base station and a terminal device, as described in the following embodiments.
  • the principle of the problem is solved by the base station and the terminal device.
  • the implementation of the base station and the terminal device can be implemented by referring to the method.
  • the terminal device includes: a first receiving unit 3901, configured to receive downlink data that is sent by the base station by using a primary component carrier and a secondary component carrier according to a predetermined sequence;
  • the first processing unit 3902 is configured to detect the downlink data received by the first receiving unit 3901 to obtain indication information that the downlink data is correctly received, received incorrectly, or does not receive any control information, and is detected according to the detection.
  • the primary component carrier and the secondary component carrier of the downlink data are allocated to allocate corresponding uplink resources;
  • the sorting unit 3903 is configured to arrange, according to an order in which the base station sends the downlink data, the indication information obtained by the first processing unit 3902 to obtain an indication information sequence;
  • the signal generation and resource determining unit 3904 is configured to generate an uplink response according to the position and quantity of the indication information obtained by detecting the secondary component carrier and the correctly received indication information in the indication information sequence in the indication information sequence. Signaling, and determining an uplink resource used to feed back the uplink response signal;
  • the signal sending unit 3905 is configured to send the uplink response signal to the base station by using the uplink resource determined by the signal generation and resource determining unit 3904, so that the base station determines downlink data that needs to be retransmitted according to the uplink response signal fed back on the uplink resource. .
  • the signal generation and resource determining unit 3904 includes:
  • a first determining unit 4001 configured to determine, in the sequence of the indication information, the number of indication information obtained by detecting the secondary component carrier;
  • the first signal generation and resource determining unit 4002 is configured to: when the first determining unit 4001 determines that the number of indication information obtained by detecting on the secondary component carrier is 1, according to the position of the correctly received indication information in the indication information sequence And the number to generate an uplink response signal, and determine an uplink resource used for feeding back the uplink response signal.
  • the signal generation and resource determining unit 3904 further includes:
  • a second determining unit 4003 configured to: when the determined result of the first determining unit 4001 is that the number of indication information obtained by detecting on the secondary component carrier is greater than 1, further determining whether the uplink resource allocated on the secondary component carrier is the same;
  • the uplink response signal is generated according to the position and quantity of the correctly received indication information in the indication information sequence, and the uplink resource used for feeding back the uplink response signal is determined.
  • the signal generation and resource determining unit 3904 further includes:
  • the third signal generation and resource determining unit 4005 is configured to: when the determined result of the second determining unit 4003 is that the uplink resources allocated on the secondary component carrier are the same, according to the indication information obtained by detecting on the secondary component carrier, The position and number of the received indication information in the sequence of indication information generates an uplink response signal, and determines an uplink resource used for feeding back the uplink response signal.
  • the first signal generation and resource determining unit 4002, the second signal generating and resource determining unit 4004, and the third signal generating and resource determining unit 4005 generate an uplink response signal and determine a method for feeding back the uplink resource of the uplink response signal, such as implementing As described in Example 3, it will not be described here.
  • the detection results on the PCC and the SCC are sorted, and according to the indication information sequence, the indication information obtained by the corresponding SCC and the correctly received indication information are located in the indication information sequence.
  • the quantity to generate an uplink response signal indicating the direction so that after receiving the uplink response signal, the base station can determine the downlink data that is correctly received, so as to further determine the downlink data that needs to be retransmitted, therefore, the base station can avoid Unnecessary data retransmission when all bundles are used to improve data transmission efficiency.
  • the embodiment of the present invention further provides a base station.
  • the base station includes: a first sending unit 4101, configured to send downlink data to the terminal device by using a primary component carrier and a secondary component carrier according to a predetermined sequence;
  • the third determining unit 4102 is configured to determine whether the downlink data received by the terminal device according to the downlink data sent by the first sending unit 4101 is correctly received, received incorrectly, or not received on the uplink resource.
  • the first retransmission unit 4103 is configured to selectively retransmit the downlink data according to the uplink response signal fed back by the uplink resource when the third determining unit 4102 determines that the uplink response signal is received on the uplink resource.
  • the process of the uplink response signal that the terminal device feeds back to the base station is as described in Embodiments 1 and 3, and details are not described herein again.
  • the direction from the first indication information to the last indication information in the indication information sequence indicates the forward direction
  • the opposite direction indicates the backward direction
  • the following specified direction is taken as an example. The description is made, but it is only an embodiment, and vice versa.
  • the uplink response signal may be the correct reception of the indication signal forward or the correct reception of the indication signal backward, as described in the above embodiments.
  • the first retransmission unit 4103 may include:
  • a signal type determining unit configured to determine whether the received uplink response signal is correctly receiving the indication signal forwardly or correctly receiving the indication signal backward; for example, if an ACK is received, determining that the indication signal is correctly received forward; NACK, it can be determined that the indication signal is correctly received backwards;
  • a correct receiving data determining unit configured to determine, according to the received uplink response signal, and an uplink resource that transmits the uplink response signal, downlink data correctly received by the terminal device; and a data retransmission unit, configured to use the first sending unit
  • the downlink data other than the downlink data correctly received by the terminal device determined by the correct receiving data determining unit in the downlink data sent by the terminal 101 is retransmitted.
  • the correct receiving data determining unit may determine the downlink data correctly received by the terminal device in the following manner:
  • the correct receiving data determining unit When the correct receiving data determining unit receives the forward correct receiving indication signal ACK fed back by the terminal device on the uplink resource, the downlink resource transmission corresponding to the uplink resource for transmitting the forward direction indication signal ACK may be determined.
  • the data and the downlink data transmitted from the downlink resources to the successive S1 downlink resources are all correctly received by the terminal device.
  • the data retransmission unit retransmits downlink data of other downlink resources (not indicated by the uplink response signal); where S1 is an integer greater than or equal to.
  • the downlink data of the downlink resource transmission corresponding to the uplink resource used for transmitting the indication signal NACK in the backward direction may be determined, and The downlink data transmitted by the S2 downlink resources of the downlink resource is correctly received by the terminal device; thus, the data retransmission unit retransmits the downlink data of other downlink resources (not indicated by the uplink response signal);
  • Sl and S2 are integers greater than or equal to.
  • the detection results on the PCC and the SCC are sorted, and according to the indication information sequence, the indication information obtained by the corresponding SCC and the correctly received indication information are in the indication information sequence.
  • the position and the quantity are used to generate an uplink response signal indicating the direction, so that after receiving the uplink response signal, the base station can determine the downlink data that is correctly received, so as to further determine the downlink data that needs to be retransmitted, therefore, the base station can avoid all Unnecessary data retransmission during bundling, improving data transmission efficiency.
  • the embodiment of the present invention provides a communication system.
  • the system includes: a base station 4201 and a terminal device 4202, wherein the base station and the terminal device are configured as described in Embodiment 4 and Embodiment 5, and are no longer Narration.
  • An embodiment of the present invention provides a method for transmitting an uplink response signal. As shown in FIG. 43, the method includes:
  • Step 4301 The user equipment UE receives downlink data that is sent by the base station by using a primary component carrier and a secondary component carrier according to a predetermined sequence.
  • Step 4302 detecting the received downlink data, to obtain indication information that the downlink data is correctly received, received incorrectly, or does not receive any control information, and according to the detected primary component carrier of the downlink data
  • the secondary component carrier allocates a corresponding uplink resource, and obtains a downlink allocation indication value DAI indicating an order of transmitting the downlink data on the primary component carrier and the secondary component carrier;
  • the base station transmits downlink data in one transmission block in one downlink subframe on the PCC and the SCC according to a predetermined sequence.
  • Step 4303 Perform time domain bundling on detection results on the primary component carrier and the secondary component carrier, respectively.
  • Step 4304 Determine, according to a mapping relationship between a last one of the downlink allocation indication value DAI detected on the secondary component carrier, a preset downlink allocation indication value DAI, a binding result on the secondary component carrier, and a modulation symbol.
  • Step 4305 determining, according to the obtained bundling result, and a mapping relationship between the preset bundling result and the modulation symbol and the uplink resource, the uplink resource that sends the modulation symbol; the uplink resource indicates that the primary component carrier or the secondary component carrier is consecutive The uplink resource corresponding to the last correctly received indication information in the correctly received indication information;
  • Step 4306 Send the modulation symbol to the base station on the determined uplink resource, so that the base station selectively retransmits the downlink data according to the modulation symbol received on the uplink resource.
  • the DAI value transmitted in the PDCCH may be used to indicate the sequence.
  • the DAI value is used to record the PDCCH that the base station cumulatively transmits.
  • the quantity, in order, the DAI can be 0, 1, 2, ..., etc.
  • the indication manner is not limited, and the transmission order may be indicated in other manners.
  • step 4305 determining, according to the binding result, the mapping relationship between the preset bundling result and the modulation symbol, and the uplink resource, the uplink resource of the determined modulation symbol is sent, and the following manner may be adopted:
  • the bundling result on the PCC and the SCC is the correctly received indication information ACK, or the indication result ACK on the PCC is the correctly received indication information ACK and the bundling result on the SCC is the incorrectly received indication information NACK/DTX, And using an uplink resource corresponding to the downlink resource related to the last correctly received indication information ACK in the correctly received indication information ACK continuously detected on the PCC;
  • the indication information ACK in the correct reception continuously detected on the SCC is used.
  • the DAI may range from 0 to 3.
  • the following steps may be further included: Determining whether the last downlink allocation indication value DAI detected on the SCC is less than 3; if the determination result is less than 3, according to the last downlink allocation indication value DAI detected on the SCC, and the preset downlink allocation indication value DAI, a mapping relationship between the bundling result on the secondary component carrier and the modulation symbol to determine the modulation symbol used;
  • the uplink resource for transmitting the modulation symbol is determined according to the binding result, the mapping relationship between the preset bundling result and the modulation symbol, and the uplink resource, and the following manner may be adopted:
  • the indication information that is correctly received and continuously detected on the SCC is used.
  • the uplink resource corresponding to the downlink resource related to the last correctly received indication information, and the corresponding modulation symbol is different from the modulation symbol corresponding to the last one of the downlink allocation indication values DAI detected on see less than 3.
  • mapping relationship may be pre-configured in the foregoing mapping relationship and stored in the user equipment in the form of a mapping relationship table.
  • the base station can transmit downlink data through one transport block in one downlink subframe on the PCC and the SCC.
  • the user equipment UE may sequentially receive the downlink data sent by the base station in the downlink subframe.
  • the user equipment UE detects the downlink data, and obtains the detection result and the DAI. And the corresponding uplink resource is allocated, and the detection result obtained by detecting the downlink data sent by each downlink subframe is corresponding to one, and the uplink resource is allocated by using the background technology or the method described in Embodiment 1, where The method is as follows:
  • the user equipment UE performs time domain bundling on the detection results on the PCC and the SCC, where the time domain bundling may be performed in the following manner: corresponding to each downlink subframe in the same CC.
  • the detection result (ACK/NACK/DTX) is "AND”. If the detection result on the same CC is ACK, the time domain bundling result is ACK, otherwise it is NACK; In 4304 ⁇ 4306, the used modulation symbol is determined according to the preset mapping relationship, and the used uplink resource is used, and then the modulation symbol is sent on the determined uplink resource.
  • the base station may also transmit downlink data through two transport blocks in one downlink subframe, and each transport block corresponds to one of the two codewords.
  • the user equipment UE may sequentially receive downlink data sent by the base station in the downlink subframe;
  • the user equipment UE detects the downlink data, and obtains the detection result and the DAI value, and the allocated uplink resource, where each subframe corresponds to a DAI value of 1 in each downlink subframe.
  • the detection result obtained by detecting the downlink data transmitted by the two transport blocks corresponds to two; and each detection result corresponds to one uplink resource, that is, the uplink resource is two (the uplink resource may be in a dominant or implicit manner) obtain).
  • step 4303 the user equipment UE performs time domain bundling on the detection results on the PCC and the SCC, where the time domain bundling can be performed as follows:
  • spatial bundling is performed on the detection results of the two codewords corresponding to each downlink sub-frame, and the bundling result corresponding to each downlink sub-frame is obtained.
  • the space bundling can be performed as follows:
  • the detection result corresponding to the two codewords in one downlink subframe is ACK, the AND operation is performed, and the obtained binding result is ACK;
  • the detection result corresponding to the first codeword of the two codewords in one downlink subframe is ACK and the other codeword is NACK, if the result of the space bundling in the previous downlink subframe of the downlink subframe Whether it is ACK, if yes, the obtained binding result is ACK, as shown in Figure 49; otherwise, it is NACK;
  • the bundle result is NACK
  • the bundling result (ACK/NACK/DTX) corresponding to each downlink subframe in the same CC is ANDed. If the bundling result on the same CC is ACK, the time domain bundling result is ACK. Otherwise, it is NACK; for example, as shown in FIG. 49, the bundling result of the time domain bundling on the PCC and the SCC is ACK, ACK.
  • step 4304 according to the last DAI value detected on the SCC, and the preset downlink allocation indication value DAI, the mapping relationship between the bundling result on the SCC and the modulation symbol Determining the used modulation symbol; or according to the downlink allocation indication value DAI corresponding to the last ACI in the continuously detected ACK on the SCC, and the preset downlink allocation indication value DAI, the binding result on the SCC and Modulating the mapping relationship of the symbols to determine the modulation symbols used;
  • step 4305 when the uplink resource that transmits the modulation symbol is determined according to the obtained bundling result and the mapping relationship between the preset bundling result and the modulation symbol and the uplink resource, the downlink situation is similar to that of the base station transmitting through a transport block.
  • the following is a brief description:
  • the detection results detected on the PCC and the SCC are respectively sorted according to the DAI value, so that there are two detection results corresponding to each DAI value, and each detection result corresponds to one uplink resource PUCCH;
  • the PUCCH corresponding to the last correctly received indication information in the indication information correctly received from DAI 0; as shown in FIG. 49, the PUCCH uses PUCCH2-2, indicating that the SCC is in the SCC.
  • An embodiment of the present invention provides a method for transmitting an uplink response signal. As shown in FIG. 44, the method includes:
  • Step 4401 The base station sends downlink data to the user equipment by using the primary component carrier and the secondary component carrier according to a predetermined sequence.
  • Step 4402 if the base station receives the user equipment on the uplink resource according to the received The downlink data is used to detect the modulated modulation symbol, and the base station determines the downlink allocation according to the received modulation symbol, and the preset downlink allocation indication value DAI, the mapping result of the binding result on the secondary component carrier and the modulation symbol. Indication value DAI;
  • the downlink allocation indication value DAI represents the last downlink assignment indication value DAI detected by the user equipment on the secondary component carrier, or indicates that the user equipment is continuously detected in the secondary component carrier.
  • the mapping relationship may be pre-configured and stored in the base station in the form of a mapping relationship table, and the specific meaning represented by the uplink resource is pre-defined between the base station and the user equipment.
  • Step 4403 The base station selectively retransmits downlink data according to the determined downlink allocation indication value DAI and the uplink resource.
  • the method further includes:
  • the base station may further perform, according to the uplink resource and the modulation symbol, and the preset downlink allocation indication value DAI, the binding result on the secondary component carrier.
  • the mapping relationship of the modulation symbols determines the downlink assignment indication value DAI.
  • the base station learns the problem of the last PDCCH miss detection in the time domain bundling according to the received modulation symbol and the preset mapping relationship.
  • the number of the primary component carrier and the secondary component carrier is 1, respectively, but is not limited thereto.
  • the number of secondary component carriers may be greater than 1, and the number of component carriers is different. The following description will be made by taking the number of sub-component carriers as 1.
  • Table 3 is a preset downlink allocation indication value DAI, a mapping relationship between the binding result on the secondary component carrier and the modulation symbol.
  • Table 4 shows the mapping relationship between the preset bundling result and modulation symbols and uplink resources.
  • mapping relationship table 3 and 4 are stored in the user equipment UE; the mapping relationship table 3 is stored in the base station, And the specific meaning of the resource representation between the user equipment UE and the base station (
  • step 4304 when the last one of the downlink allocation indication value DAI detected on the secondary component carrier, and the preset downlink allocation indication value DAI, the binding result on the secondary component carrier
  • the mapping relationship shown in Table 3 below can be employed.
  • step 4305 when the uplink resource that sends the modulation symbol is determined according to the obtained binding result and the mapping relationship between the preset binding result and the modulation symbol and the uplink resource, the mapping relationship shown in Table 4 may be adopted. .
  • the indication information NACK/DTX uses the uplink resource corresponding to the last correctly received indication information ACK in the correctly received indication information ACK continuously detected on the PCC; in this embodiment, the binding result is ACK.
  • the modulation symbols that can be used include (0, 1), (1, 0), (1, 1); In the case of ACK and NACK/DTX, the modulation symbols that can be used are (0, 0);
  • the last of the correctly received indication information ACK continuously detected on the SCC is used.
  • the modulation symbols that can be used include (0, 1), (1, 0), (1, D o
  • the bundling result obtained after the time domain bundling is ACK.
  • the table 4 is used to obtain the used uplink resource.
  • the uplink resource is the PUCCH on the PCC, that is, in the ACK continuously detected on the PCC.
  • the uplink resource is PUCCH1.
  • the user equipment UE transmits the modulation symbol (1, 0) on the PUCCH1, and when the base station receives the modulation symbol (1, 0) on the uplink resource PUCCH1, the table 3 can be found to obtain the last one detected on the SCC.
  • the base station knows, according to the uplink resource that transmits the modulation symbol, that the last one of the correctly received indication information that is continuously detected from the last correctly received indication information ACK on the PCC is correct.
  • the downlink data corresponding to the received indication information ACK is correctly received by the user equipment, and the base station knows that the data that has been correctly received is not retransmitted, and the remaining data will be retransmitted.
  • the method for transmitting an uplink response signal will be described below by taking the scenario shown in FIG. 6 as an example.
  • the bundling result obtained after time domain bundling is ACK; in SCC
  • the uplink resource is a PUCCH on the PCC, that is, an uplink resource corresponding to the last consecutive correctly received indication information ACK in the consecutively detected ACKs on the PCC.
  • the uplink resource is PUCCH1.
  • Table 5 is a preset downlink allocation indication value DAI, a mapping relationship between the binding result on the secondary component carrier and the modulation symbol.
  • Table 6 shows the mapping relationship between the preset binding result and modulation symbols and uplink resources.
  • A* indicates that the last detected DAI in the SCC is not an ACK obtained by 3 time domain bundling.
  • the use is continuous on the see.
  • the uplink resource corresponding to the last correctly received indication information in the correctly received indication information is detected, and the modulation symbol corresponding to A** is different from the modulation symbol corresponding to A*.
  • the PUCCH on the SCC can be used to transmit the last detected in the SCC.
  • step 4304 when the downlink allocation indication value DAI is in the range of 0 to 3, when the user equipment UE determines that the last downlink allocation indication value DAI detected on the SCC is less than 3, in step 4304
  • the modulation symbol can be obtained based on the last one of the downlink assignment indication values DAI detected on the SCC, and Table 5.
  • the uplink resource for transmitting the modulation symbol can be obtained according to the bundling result and Table 6 in step 4305. This situation is similar to application example 1, and will not be described here.
  • step 4304 modulation may be obtained according to the downlink allocation indication value DAI and the binding result on the PCC and Table 5. symbol.
  • step 4305 the uplink resource for transmitting the modulation symbol can be obtained according to the bundling result and Table 6.
  • Table 7 is a preset downlink allocation indication value DAI, a mapping relationship between the binding result on the secondary component carrier and the modulation symbol.
  • Table 8 shows the mapping relationship between the preset bundling result and modulation symbols and uplink resources.
  • the QPSK modulation symbol indicates the downlink allocation indication value DAI corresponding to the last correctly received indication information ACK in the correctly received indication information ACK continuously detected on the SCC.
  • the binding and table lookup of the user equipment UE on the SCC may be as follows:
  • the base station can check Table 7, including the following base station conditions:
  • the base station learns that: all errors sent on the SCC, retransmission all downlinks Data
  • the base station learns that: the first two or the last three downlink data sent are correctly received by the user equipment UE.
  • the modulation symbol and the uplink resource for transmitting the modulation symbol are obtained by looking up Table 7 and Table 8.
  • the method is similar to the above application example, and details are not described herein again.
  • the nine downlink subframes correspond to one uplink subframe. If the foregoing method is used, it is required to limit one user equipment UE to only schedule 3 or 4 times, and convert into a general TDD configuration. Then use the above method for processing.
  • the QPSK modulation symbol can be fed back to the base station by using different PUCCHs corresponding to the SCC.
  • the base station can jointly determine the value of the last detected DAI based on the location of the PUCCH and the value of QPSK.
  • the terminal device can obtain the corresponding modulation symbol and the uplink resource that sends the modulation symbol according to the preset mapping relationship and the detection result, so that after receiving the modulation symbol, the base station can learn the last time in the time domain bundling.
  • a person skilled in the art can understand that all or part of the steps of implementing the above embodiments 7 and 8 can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium.
  • the program may include all or part of the steps in the foregoing embodiment, and the storage medium may include: a ROM, a RAM, a magnetic disk, an optical disk, and the like.
  • the embodiment of the invention further provides a base station and a terminal device, as described in the following embodiments.
  • the principle of the problem is solved by the base station and the terminal device.
  • the implementation of the base station and the terminal device can be implemented by referring to the method.
  • the terminal device may be User equipment UE.
  • the terminal device includes: a second receiving unit 4601, configured to receive, by a base station, a primary component carrier according to a predetermined sequence. And downlink data transmitted by the secondary component carrier;
  • the second processing unit 4602 is configured to detect the downlink data received by the second receiving unit 4601 to obtain indication information that the downlink data is correctly received, received incorrectly, or does not receive any control information, and obtain an indication.
  • a downlink allocation indication value DAI for transmitting the downlink data on the primary component carrier and the secondary component carrier;
  • the bundling unit 4603 is configured to perform time domain bundling on the detection results on the primary component carrier and the secondary component carrier respectively.
  • the first symbol determining unit 4604 is configured to: according to the last one of the downlink allocation indication value DAI detected on the secondary component carrier, and a preset downlink allocation indication value DAI, a binding result on the secondary component carrier, and a modulation symbol Mapping the relationship to determine the used modulation symbol; or according to the downlink allocation indication value DAI corresponding to the last correctly received indication information in the continuously detected correctly received indication information on the secondary component carrier, and a preset Determining a modulation symbol used by determining a mapping relationship between a downlink allocation indication value DAI, a bundling result on a secondary component carrier, and a modulation symbol;
  • the resource determining unit 4605 is configured to determine, according to the bundling result obtained by the bundling unit, and the mapping relationship between the preset bundling result and the modulation symbol and the uplink resource, the uplink resource that sends the modulation symbol; the uplink resource is represented by the primary component carrier Or an uplink resource corresponding to the last correctly received indication information of the correctly received indication information continuously detected on the secondary component carrier;
  • the second sending unit 4606 is configured to send the modulation symbol to the base station on the determined uplink resource, so that the base station selectively retransmits the downlink data according to the modulation symbol received on the uplink resource.
  • the resource determining unit 4605 may include:
  • a first resource determining unit (not shown), indicating that the bundling result on the primary component carrier and the secondary component carrier is correctly received, or the binding result on the primary component carrier is correctly received
  • the indication information is used and the result of the bundling on the secondary component carrier is the indication information that is incorrectly received, the uplink resource corresponding to the last correctly received indication information of the correctly received indication information continuously detected on the primary component carrier is used;
  • the bundling result on the primary component carrier is indication information that is incorrectly received, and the bundling result on the secondary component carrier is correctly received.
  • the uplink resource corresponding to the last correctly received indication information of the correctly received indication information continuously detected on the secondary component carrier is used.
  • the terminal device further includes: a first indication value determining unit (not shown), configured to: at the first symbol determining unit 4604, according to the last one of the downlink allocation indication values DAI detected on the secondary component carrier, And determining, by the preset downlink allocation indication value DAI, the mapping relationship between the bundling result on the secondary component carrier and the modulation symbol to determine the used modulation symbol, determining the last downlink allocation indication value DAI detected on the secondary component carrier.
  • a first indication value determining unit (not shown), configured to: at the first symbol determining unit 4604, according to the last one of the downlink allocation indication values DAI detected on the secondary component carrier, And determining, by the preset downlink allocation indication value DAI, the mapping relationship between the bundling result on the secondary component carrier and the modulation symbol to determine the used modulation symbol, determining the last downlink allocation indication value DAI detected on the secondary component carrier.
  • the first symbol determining unit 4604 is further configured to: when the determined result of the first indication value determining unit is less than 3, perform the last one of the downlink allocation indication values DAI detected on the secondary component carrier And a preset downlink allocation indication value DAI, a mapping relationship between the binding result on the secondary component carrier and the modulation symbol to determine the modulation symbol used.
  • the terminal device further includes:
  • a second symbol determining unit (not shown), configured to: when the determined result of the first indication value determining unit is equal to 3, according to the downlink allocation indication value DAI and the binding result on the primary component carrier, And determining a used modulation symbol by using a preset downlink allocation indication value DAI and a binding result on the primary component carrier, a mapping result of the binding result on the secondary component carrier, and a modulation symbol;
  • the resource determining unit 4605 includes a third resource determining unit, configured to use, when the binding result on the primary component carrier is indication information that is incorrectly received, and the binding result on the secondary component carrier is the correctly received indication information, The uplink resource corresponding to the last correctly received indication information of the correctly received indication information continuously detected on the secondary component carrier, and the corresponding modulation symbol and the last one of the downlink allocation indication value DAI detected on the secondary component carrier When it is less than 3, the corresponding modulation symbols are different.
  • mapping relationship used by the foregoing terminal device may be the mapping relationship table shown in Table 4 to Table 8, and is not described here.
  • the terminal device can obtain the corresponding modulation symbol and the uplink resource that sends the modulation symbol according to the preset mapping relationship and the detection result, so that after receiving the modulation symbol, the base station can learn the last time in the time domain bundling.
  • An embodiment of the present invention provides a base station.
  • the base station includes:
  • the second sending unit 4701 is configured to send downlink data to the terminal device by using the primary component carrier and the secondary component carrier according to a predetermined sequence;
  • the second indication value determining unit 4702 is configured to: when receiving, by the terminal device, the modulation symbol that is fed back by the terminal device according to the received downlink data, according to the received modulation symbol, and a preset downlink allocation indication a value DAI, a mapping relationship between the bundling result on the secondary component carrier and the modulation symbol to determine a downlink allocation indication value DAI;
  • the downlink allocation indication value DAI represents the last downlink assignment indication value DAI detected by the user equipment on the secondary component carrier, or indicates that the user equipment is continuously detected in the secondary component carrier.
  • the second retransmission unit 4703 is configured to selectively retransmit the downlink data according to the downlink allocation indication value DAI determined by the second indication value determining unit 4702 and the uplink resource.
  • the base station further includes a third indication value determining unit 4704, where the uplink resource is the last one of the correctly received indication information continuously detected on the secondary component carrier.
  • the mapping relationship between the bundling result on the carrier and the modulation symbol determines the downlink assignment indication value DAI.
  • the second retransmission unit 4703 is further configured to selectively retransmit the downlink data according to the downlink allocation indication value DAI determined by the third indication value determining unit 4704 and the uplink resource.
  • both the terminal device and the base station may include a storage unit for storing a related mapping relationship table.
  • the base station can determine the last PDCCH miss detection problem according to the modulation symbols received on the uplink resource, and determine the downlink data that needs to be retransmitted.
  • An embodiment of the present invention provides a communication system, where the communication system includes:
  • the base station comprising the base station described in Embodiment 10;
  • the terminal device includes the terminal device described in Embodiment 9.
  • the embodiment of the present invention further provides a computer readable program, wherein when the program is executed in a base station, the program causes a computer to perform the method for transmitting an uplink response signal according to claim 10 in the base station, or 23 or 24 of the method of transmitting an uplink response signal.
  • the embodiment of the present invention further provides a computer readable program, wherein the program causes a computer to perform a method of transmitting an uplink response signal as described in Embodiment 2 or Embodiment 8 in the base station when the program is executed in a base station.
  • the embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform a method of transmitting an uplink response signal as described in Embodiment 2 or Embodiment 8 in a base station.
  • An embodiment of the present invention provides a computer readable program, wherein when the program is executed in a terminal device, the program causes the computer to execute the method of transmitting an uplink response signal as described in Embodiment 1 or 3 in the terminal device.
  • An embodiment of the present invention provides a storage medium storing a computer readable program, wherein the computer readable program causes a computer to execute a method of transmitting an uplink response signal as described in Embodiment 1 or 3 in a terminal device.
  • the above apparatus and method of the present invention may be implemented by hardware or by hardware in combination with software.
  • the present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or a step.
  • the present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.

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Abstract

La présente invention se rapporte à un procédé, à une station de base et à un appareil formant terminal pour la transmission d'un signal de réponse sur la liaison montante. Le procédé selon l'invention comprend les étapes consistant : à recevoir des données sur la liaison descendante, les données étant transmises depuis une station de base sur la base d'un ordre prédéterminé et par le biais de composantes porteuses primaires et de composantes porteuses secondaires ; à détecter les données sur la liaison descendante reçues, dans le but d'obtenir des messages d'indication pour recevoir les données sur la liaison descendante ou pour ne recevoir aucune donnée de contrôle de manière correcte ou erronée, et pour distribuer des ressources correspondantes sur la liaison montante en fonction des composantes porteuses primaires et des composantes porteuses secondaires sur lesquelles se trouvent les données sur la liaison descendante ; à agencer les messages d'indication détectés en fonction de l'ordre de transmission des données sur la liaison descendante par la station de base, dans le but d'obtenir une séquence de messages d'indication ; à générer un signal de réponse sur la liaison montante, et à déterminer une ressource sur la liaison montante pour renvoyer par rétroaction le signal de réponse sur la liaison montante ; à envoyer le signal de réponse sur la liaison montante à la station de base au moyen de la ressource sur la liaison montante déterminée, dans le but de déterminer les données sur la liaison descendante qui doivent être retransmises par la station de base en fonction du signal de réponse sur la liaison montante renvoyé par rétroaction sur la ressource sur la liaison montante. Le procédé selon l'invention permet à la station de base d'éviter toute retransmission de données inutile.
PCT/CN2010/077870 2010-10-19 2010-10-19 Procédé, appareil formant terminal et station de base pour transmettre un signal de réponse sur la liaison montante Ceased WO2012051750A1 (fr)

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PCT/CN2010/077870 WO2012051750A1 (fr) 2010-10-19 2010-10-19 Procédé, appareil formant terminal et station de base pour transmettre un signal de réponse sur la liaison montante
CN2010800696569A CN103155634A (zh) 2010-10-19 2010-10-19 传输上行响应信号的方法、终端设备和基站
US13/865,465 US9351287B2 (en) 2010-10-19 2013-04-18 Method for transmitting uplink response signal, terminal equipment and base station

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